Liquid-fuel stove



w. L. COOPER ET AL LIQUID FUEL STOVE Filed Aug. 4, 192'7` Dec. 3o, 1930. 1,787,189

lirs

Patented Dec. 30,1193() UNITED sTAisrATENr `wiLLrAivi L. COOPER AND LEON D. FORMER, or KANKAKEE, ILLiNoIs, AssieNoRs To OFFICE SEARS, ROEBUGK AND C0., F CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK LIQUID-FUEL STOVE lApplicationfiled August. 4, 1927. Serial No. 210,513.

The invention relates to liquid-fuel stoves and particularly to stoves in Awhich combustion of the fuel is eected by means of the socalled wickless type of oilburner.

Ordinarily, the wickless type of oil burner vlevel supply source of the fuel, the source and the bowl being, of course, suitably connected. The ultimate aim of the invention is to provide aniniproved mechanism appilied in this instance, directly to the burner to eifect'a raising or lowering of the fuel level therein., p f

Y' In prior devices of this character -it has been customary to control the raising and lowering of the burnerby means of a rotatable operating member which had the disadvantageous feature of requiring a considerable rotational movement to move the burner from an off to an on position or reverse.

. The primary Object of the invention is to provide a new and improved rotatable means 3o for adjusting a burner, which is readily and conveniently Operable to vary the position of the burner and wliichfeifects such an adjustkment by means arranged to increase the movement of the operating member to such an extent that a relatively small movement ofthe member produces a relatively large `raising or lowering'of the'burner.

f yber which is so arranged as to permit ready disassembly for cleaning, repairs, replace- `ment of parts and like reasons;

Other objects and advantages will become apparent in they following description of an l exemplary form of the inventionuand from -the accompanying drawings, in which:

i Figure l illustrates a view in elevationof comprises a bowl having a relatively deep a portion of a stove embodying a wickless oil burner with a part thereof removed as shown -by the section line 1-1 of Fig. 2.

Fig. 2 is a sectional view of the invention taken on the line 2 2 of Fig. 3. y Y

Figs. 3 and t are rear views of the device .showing the raised and lowered positions -of the burner. f

Although the invention 'is susceptible of various modiications and alternative con-V structions, we have shown f and herein described'in detail the preferred embodiment but it is to be understood that we do not ltherebyintend to limit the invention to the specific form disclosed but intend to cover all modifications and alternative constructions falling lwithin thespirit and scope of the invention as eXpressed inthe'ap-pended Cl. alms.

Y f In the drawings, one of the usual groups Vof burners' has .been shown as being mount- -ed for independent movement vertically with respect to a fixed constant level fuel supply (not shown). The burner bowl 5 in this instance comprises the part which is raised and lowered and provides the usual annular channel k6. A- suitable mounting for the bowl Yin the form of the supporting member 7 is vertically adjustable relative to the sto-ve body,

a portion of the frame of which is shown as the front plate 8.l A' fuel supply pipe`9 which preferably is common to all of the burners carries an oil riser 10 suitably connected, as by welding, to the pipe to provide a leak proof joint. f

A fuel pipell is rigidly carried Vby the burner bowl 5 and is arranged to telescope intothe riserlO through an appropriate stuifing box 12'. Other suitable means of providing an extensible connection between' the riser and the bowl may 'be provided but the telescoping arrangement is preferred since a certain measure of support is aiforded the bowl tlfiereby.V `lhztending rearwardly" from the front plate 8- is a rigid bracketl (Fig. 2) which comprises a plate 13a perpendicularly kdisposed relative to thefront plate 8, a pair of laterally spaced front and rear members 14,

15, and a pair ofvertically spaced .horizon-V vsusv 'tal arms 16. The bracket in this embodiment is suitably secured through the front mem'- ber 14 to the front plate 8 of the stove as by means of the bolts 17. The oil riser extends through the vertically spaced arms 16 VVoperatorwhich cam member is operatively associated with the burner to produce the raising or lowering thereof." In addition the cam member is arranged to beV moved vertically relatively to the stovev andv independently ofthe burner to produce a more rapid movement of the burner.

To this end, there is provided in the front plate 8 of the stove and in the spaced mem-` bers 14, 15 of the bracket a series of alined verticali slots 19 through which the shaft 20 of an operatingV member extends. Normally theV shaft V2O rests upon and is supportedby the lower edges of the slots 19:

and suflicient clearancev between the sides of Ythe slots and the shaft permits freeV vertical movement thereof through the length of the slots. a cam member in therform of a disk 21 which is provided with a spiral or scroll cam slot 22, the arrangement of parts being such that the surface of the cam is spaced only a small distance from and parallel to the surface of 'the inner member 15. Since the scroll cam' slot 22 is of considerable length means may be'provided lto reenforce the cam disk 21,

vwhich means in this instance comprises a diametrically positioned stay 23, having raised portions 24 thereon over each intersection y `with the slot 22 to permit the cam followers,

lhereinafter described, to pass readily therebeneath. Y

The increase or multiplication of the move-y ment of the operating member in adjusting the burner bowl vertically is effected by the association of a pair of cam followers with the cam slot bv which the burner bowl 5 and its support 7 are moved relatively with re- Spect to the cam 21 and the cam at the same time is moved relatively with respect to the stove.

-To this end a cam follower in the form of a pin 25 is rigidly secured near the lower end of the burner bowl support 7. A second pin Aor follower 26 Vis securely mounted on the upper portion of the inner bracket member and proj ects outwardly therefrom. When the partsare in assembled relation the burn- Ver bowl -supportf7 is positioned for sliding The inner end of the shaft carries movement intermediate the cam disk 21 and the bracket 13. The support is provided with a vertical slot 27 through which the cam follower 26 secured to the bracket 13 extends to engage one part of the cam slot 22. The cam follower on the support 7 is arranged to engage the lcam slot at a point below and in vertical alinement with the follower 26. v By this arrangement it will be seen that when the camrdisk is rotated the engagement of the stationary follower 26 on the bracket with the cam slot 22 causes the cam disk to move vertically invone direction or the other with the operating shaft 20 riding upwardly or downwardly in the alined slots 19 in the bracket andthe front plate. At the same time' the engagement of theother cam follower 25 with the slot 22 will effect a corresponding raising or lowering movement of the support 7 and burnerbowl 5 with respect to the cam disk 21. Consequently, the action of the cam in moving through a given angular distance results in a vertical movement of the burner bowl through a distance approximately double the distance which could be attained in the customary manner. ThusV it is possible to provide a burner in which, at the most, a single revolution of the operating member causes a movement of the burner bowl from its upper to its lower limit A or vice versa.

As shown in Fig. 2, the operating shaft 20 extends forwardly beyond the front plate 8 a convenient distance and is squared at the end as at 28 to receive a suitable handle 29. A tubular` sleeve 30lits loosely about the shaft 20 intermediate the handle and the bracket and bears against aL washer 31'which extends acrossor straddles the slot 19 in the bracket member' 14. The parts are secured together in operating relation by suitable means'such as the nutV 32 screw threaded on thek end of the shaft. v y

Since in this embodiment, it is possible to completely raise or lower the burner by less than one revolution of the operating member, indicating means to aid in determining the position o f the burner with respect to the constant level fuel supply maybe provided directly upon the ,front or face plate and the operating member.` In the present instance this means comprises suitable indiciav or indicating characters 33 painted, stamped or otherwise vpositioned upon the face plate about the operating shaft. The shaft carries an indicating means herein shown in the form of a head 34 having a squared aperture therein to t the squared portion 28 of the shaft and a pointer v positioned adjacent the face plate 8 by means of an offset portion 36 of the indicator therebetween.

By the construction provided it is only necessary to unscrew the nut 32 to permit the handle 29, the indicator 34, the sleeve 30 and Ithe washer 31 to be removed from the ip/emes shaft 20. The cam disk Q1 and the shaft may then be withdrawn from the bracket 1.3, which permits the burner bowl 5 to be withdrawn from its engagement with the bracket. Thus, the entire device may be readily assembled or may be taken apart for cleaning,

repair or any other cause by simply removing kincluding a burner bowl, a vertical fuel supply pipe, a vpipe connected to and carried by said bowl and telescoping with the vertical supply pipe, a bracket secured to the stove body, said bracket and body having vertical elongated alined slots therein, an operating shaft extending through said slots in said body and bracket and capable of vertical movement in said slots, a cam carried by the inner end of said s-haft adjacent thevinner side of said bracket, said cam having a scroll cam slot therein, a support for said bowl positioned for vertical movement between the bracket and the cam, a cam follower fixed-to said bracket, and a second cam follower carried by said movablesupport, said pins being arranged to engage said cam slot at spaced points thereon whereby rotational movement of said operating` 'shaft effects a vertical movement of said shaft and cam and a more rapid vertical movement of said support and bowl.

2. A liquid fuel stove comprising, in combination, a stove body, a burner bowl for a wickless fuel burner, means establishing communication between said bowl and a fuel supply ofV substantially constant level, a vertically movable support for said bowl, a cam lnving a scroll cam slot therein adjacent a part of said movable support and movable vertically a limited distance, means for rotating said cam, means fixed on said stove body and engaging said cam slot to effect a vertical movement of said cam when said cam is rotated, and means on said movable support associated with said cam slot to effect a simultaneous vertical movement of said support.

3. A. liquid fuel stove comprising, in combination, a stove body, a burner bowl for a liquid fuel stove, a vertically movable support for said bowl, and manually operable means for raising or lowering said bowl, said means including a cam associated with a .fixed part'offsaid stovev Lbody to effect a raising or loweringmovementof .said cam uponrotatiion thereof, and means' upon said movableV support --associated` with. said cam `for effecting a simultaneous raising or lower ing of said support relative to said cani.

4t. In a liquid fuel stove, in combination, a stove body, a burner bowl,.a vertically movable .support for said bowl, a scroll cam mounted on said stove body arranged for.v

limited vertical movement relative to said stove body upon rotation of the cam, and

means on said support engaging said cam to edect a vertical movement of said burner bowl relative to said cam.

5. In a wickless fuel burner, in combination, a frame, a fuel container adapted to be positioned to'change the fuel level therein to regulate a flame, a supportfor said container adapted for vertical movement relative tothe frame, and means mounted on said frame for adjusting the position of said container, said means being movable vertically relative to said frame and adapted simultaneously with the movement thereofto effect a vertical:

movement of said support relative to said means whereby the change in position of said container may be effected by a limited movenient of said means.r Y

ing and lowering means for the receptacle including a scroll cam adapted to move upwardly or downwardly upon. rotation thereof said receptacle being connected to said cam for up-and-down movement relative thereto as said cam is rotated whereby operative rotation of said cam effects la multiplied movement of said receptacle.

7'. ln a burner regulating mechanism, a bracket, a shaft mounted in said bracket, a regulating member rigidlyY secured to one end of said shaft, an operating handle carried by the other end of said shaft, a sleeve mounted about said shaft intermediate said bracket and operating handle, and a single removable means on said other end of said shaft for securing the parts in assembled relation.

8. yln a wickless fuel stove,'in combination,

9. The combination of a stove frame having guides, a burner, a supporting member for the burner, slida-ble vertically on the frame to raise or lower the burner, an operating handle and shaft rotatable and also movable vertically in the guides of the frame,

b. rlhe combination with-a fuel receptable los and means actuated'by' rotation of the handle .andxshaftto raise or lower the sunporting member relative to Vthe. shaft and simulta- Y neously raise or lowerthe shaft in said guidesv relative to the frame.

In testimony whereof We'have hereunto affixed our signatures.

WILLIAM L. COOPER. LEON D. FORTIER. 

